What are the conserved dinucleotide sequences typically found at the 5' and 3' ends of spliceosomal introns?
Explanation
The precise removal of introns by the spliceosome depends on the recognition of conserved sequences at the intron-exon boundaries. For the major class of introns, the 5' splice site almost invariably begins with the dinucleotide GU, and the 3' splice site ends with the dinucleotide AG. These sequences are critical for the assembly and catalytic action of the spliceosome.
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